Ukraine war latest: Russia's Syzran oil refinery halts operations following May 21 Ukrainian drone strike (opens in new tab)

Key developments on May 26: * Syzran oil refinery halts operation after May 21 Ukrainian drone strike, Ukraine's General Staff reports * Ukraine using 'secret' strike drones to devastate Russian logistics on crucial highway, Nemesis Brigade says * 'Russia's true attitude' — Iskander missile strike damages UN humanitarian warehouse in Dnipro * Lavrov warns Rubio of planned strikes on Kyiv's 'decision-making centers,' urges US embassy evacuation as EU vows to stay * Russian attacks kill 8, i